60 POPULAR LECTURES AND ADDRESSES. 



" From the south-east point of entrance to the 

 Tagus, the South Cachopo extends to the W. 

 and W.S.W. for 2j miles. From the depth of 

 4| fathoms, at the west end of the shoal, Bugio 

 Fort bears E.N.E. easterly distant if miles. 

 The larger portion of this shoal has little more 

 than i fathom water on it, and around Bugio 

 Fort the sand is dry at low water. 



" The bar between the western extremes of 

 the Cachopos, has 6 and 7 fathoms over it at 

 low water springs ; the channel within it soon 

 deepens to 9 fathoms, increasing to 19 fathoms, 

 abreast Bugio Fort. Notwithstanding the depth 

 upon the bar, and the distance between the 

 extremes of the Cachopos, the sea in S.W. gales 

 rolls over it with great force, frequently forming 

 one tremendous roller that breaks with irresistible 

 violence the whole distance across ; at such times 

 the bar is impracticable, and in winter, or w r hen 

 the freshes are strong and accompanied with 

 westerly gales, continues so for several days 

 together. 



